Spirit-level.



PATBNTED MAY 10, 1904.

C. F. CRAWFORD. SPIRIT LEVEL.

APPLIOATION FILED JAN 14 1904 no MODEL.

aflarawpd,

Patented May 10, 1904.

PATENT OFFICE.

I CHARLES F. CRAWFORD, OF PITTSBURG, PENNSYLVANIA.

SPIRIT-LEVEL.

SPECIFICATION forming part of Letters Patent No. 759,594, dated May 10,1904,

Application filed January 14,1904. Serial No. 188,968. (No model.)

To all whom it may concern:

Be it known that I, CHARLES F. CRAWFORD, a citizen of the United Statesof America, residing at Pittsburg, in the county of Allegheny and Stateof Pennsylvania, have invented certain new and useful Improvements inSpirit- Levels, of which the following is a specification, referencebeing had therein tothe accompanying drawings.

This invention relates to certain new and useful improvements in levels,and more particularly to that class of levels which are employed bymasons for determining the plane of different bodies.

The object of my invention is to provide a level having therein aplurality of level-glasses whereby the same may be used to determine thevertical plane of a body as well as the horizontal, and upon this levelI provide means whereby a plumb-line may be suspended to determine thevertical plane of difierentbodies.

Briefly described, my improved level consists of a body portion havingtherein a plurality of apertures in which I locate the levelglasses, oneor more of these glasses being arranged in a horizontal position, and inthe one end of the body portion of the level I provide an aperture inwhich is adapted to swing the weight of the plumb-line, which isattached to the other end of the level.

My invention further consists in the novel construction, combination,and arrangement of parts to be hereinafter more fully described, andspecifically pointed out in the claims.

In describing the invention in detail reference is had to theaccompanying drawings, forming a part of this application, and whereinlike numerals of reference indicate like parts throughout the severalviews, in which- Figure 1 is a side elevation of my improved level. Fig.2 is a vertical sectional view of a portion of the level. Fig. 3 is ahorizontal sectional view showing one of the horizontal level-glasses,and Fig. A is a detail perspective view of one of the frames in whichthe water-level is placed prior to securing the same within the level. 7

To put my invention into practice, I provide a body portion 1, whichconstitutes the level proper, and in the upper end of this body portionI provide a slot 2, in which is adapted to be secured one end of aplumb-line, which is of the ordinary type, having a weight on its oneend, and in the lower end of the body portion 1 I provide an aperture 2,in which this weight is adapted to swing. On the sun face of the levelis provided a line 3, with which the plumb-line when vertical is adaptedto coincide, this line being provided to indicate when the plumb-line isnot hanging true with respect to the body to which it is applied.

Centrally of the body portion I provide an aperture 4, in which I securea level-glass 5, which is placed therein in longitudinal alinement withthe body portion 1, and in the upper end of the body portion 1 I providethe apertures 6, in which the level-glasses 7 are secured, theselevel-glasses being placed at right angles to that of the glass 5,whereby two different planes may be determined by the level. Thelevel-glasses consist of the vacuum-tube 8, which is of the ordinaryconstruction generally used, and around this tube I provide an extratubing 9 to further protect the tube 8 and prevent the same frombecoming broken or otherwise damaged. The tubes 8 and 9 are secured inthe level by an annular band 10, having formed therein and diametricallyopposite each other the collars 11, these collars being formed integralwith the band 10-, and in them is adapted to be placed the tubes 8 and9, these tubes being placed therein prior to placing the band 10 withinthe aperture 6. In the .bands 10 I provide. apertures 12, through whichpass the screws 14, which are adapted to engage the body portion 1 ofthe level and rigidly hold the band 10 within the aperture formed in thebody portion 1.

It will thus be seen that my improved level consists of a plurality oflevel-glasses, which maylbe renewed from time to time within the leveWhile I have illustrated my improved level as having therein onevertical glass and two horizontal glasses, it will be seen that I mayreadily employ a number of vertical glasses and any number of horizontalglasses and I may make other slight changes in the details ofconstruction of my level without departing from the general spirit of myinvention.

Having fully described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. A level comprising a body portion having a plurality of aperturesformed therein, annular bands having collars at diametrically oppositepoints thereon secured in said apertures, glass tubes in said collars,and level-- glasses received in said glass tubes.

2. A level comprising an apertured body portion, bands arranged in theapertures and carrying collars interiorly thereof, a level- 5 glasssurrounded by a glass tube, the ends of said tubes received in saidcollars.

In testimony whereof I aifiX my signature in the presence of twowitnesses.

C. F. CRAWFORD.

Witnesses:

H. G. EVERT, W. C. HEITZ.

